A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools
The continuing development of analytical methods for investigating sedimentary records calls for iterative re-examination of existing data sets obtained on loess-palaeosol sequences (LPS) as archives of palaeoenvironmental change. Here, we re-investigate two LPS (Hecklingen, Zilly) in the northern H...
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Online Access: | https://serval.unil.ch/notice/serval:BIB_E4E18C1E9853 https://doi.org/10.1111/bor.12510 https://serval.unil.ch/resource/serval:BIB_E4E18C1E9853.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_E4E18C1E98533 |
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ftunivlausanne:oai:serval.unil.ch:BIB_E4E18C1E9853 2024-02-11T10:04:55+01:00 A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools Schmidt, Christoph Zeeden, Christian Krauß, Lydia Lehmkuhl, Frank Zöller, Ludwig 2021-02-04 application/pdf https://serval.unil.ch/notice/serval:BIB_E4E18C1E9853 https://doi.org/10.1111/bor.12510 https://serval.unil.ch/resource/serval:BIB_E4E18C1E9853.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_E4E18C1E98533 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1111/bor.12510 info:eu-repo/semantics/altIdentifier/pissn/0300-9483 info:eu-repo/semantics/altIdentifier/pissn/1502-3885 info:eu-repo/grantAgreement/OTHER//ZO51-39-1/// info:eu-repo/grantAgreement/OTHER//ID 57444011 - SFB 806/// info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_E4E18C1E98533 https://serval.unil.ch/notice/serval:BIB_E4E18C1E9853 doi:10.1111/bor.12510 https://serval.unil.ch/resource/serval:BIB_E4E18C1E9853.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_E4E18C1E98533 info:eu-repo/semantics/openAccess CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Boreas, vol. 50, pp. 746-763 Archaeology Geology Ecology Evolution Behavior and Systematics info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion 2021 ftunivlausanne https://doi.org/10.1111/bor.12510 2024-01-22T00:56:33Z The continuing development of analytical methods for investigating sedimentary records calls for iterative re-examination of existing data sets obtained on loess-palaeosol sequences (LPS) as archives of palaeoenvironmental change. Here, we re-investigate two LPS (Hecklingen, Zilly) in the northern Harz foreland, Germany, being of interest due to their proximity to the Scandinavian Ice Sheet (SIS) and the position between oceanic climatic influence further west and continental influence towards the east. First, we established new quartz OSL and polymineral IRSL chronologies. Both methods show concordant ages in the upper part of the Hecklingen profile (~20–40 ka), but in the lower part IRSL underestimates OSL ages by up to ~15 ka for the period 40–60 ka. Interpretations hence refer to the OSL data set. Second, we applied Bayesian age-depth modelling to data sets from Hecklingen to resolve inversions in the original ages, also reducing averaged 1σ uncertainty by ~19% (OSL) and ~12% (IRSL). Modelled chronologies point out phases of increased (MIS 2, early MIS 3) and reduced (middle and late MIS 3) sedimentation, but interpretation of numerical rates is problematic because of intense erosion and slope wash particularly during MIS 3. Finally, previously obtained grain-size data were re-investigated by end member modelling analyses. Three fundamental grain-size distributions (loadings) explain the measured data sets and offer information on intensity and – combined with modelled OSL ages – timing of geomorphic processes. We interpret the loadings to represent (i) primary loess accumulation, (ii) postdepositional pedogenesis and/or input of aeolian fine fractions, and (iii) input of coarse aeolian material and/or slope wash. The applied modelling tools facilitate detailed understanding of site-formation through time, allowing us to correlate a strong peak in mean grain size at ~26–24 ka to the maximum extent of the SIS and increased influence of easterly winds. Article in Journal/Newspaper Ice Sheet Université de Lausanne (UNIL): Serval - Serveur académique lausannois Strong Peak ENVELOPE(-82.300,-82.300,-79.933,-79.933) Boreas 50 3 746 763 |
institution |
Open Polar |
collection |
Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
op_collection_id |
ftunivlausanne |
language |
English |
topic |
Archaeology Geology Ecology Evolution Behavior and Systematics |
spellingShingle |
Archaeology Geology Ecology Evolution Behavior and Systematics Schmidt, Christoph Zeeden, Christian Krauß, Lydia Lehmkuhl, Frank Zöller, Ludwig A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools |
topic_facet |
Archaeology Geology Ecology Evolution Behavior and Systematics |
description |
The continuing development of analytical methods for investigating sedimentary records calls for iterative re-examination of existing data sets obtained on loess-palaeosol sequences (LPS) as archives of palaeoenvironmental change. Here, we re-investigate two LPS (Hecklingen, Zilly) in the northern Harz foreland, Germany, being of interest due to their proximity to the Scandinavian Ice Sheet (SIS) and the position between oceanic climatic influence further west and continental influence towards the east. First, we established new quartz OSL and polymineral IRSL chronologies. Both methods show concordant ages in the upper part of the Hecklingen profile (~20–40 ka), but in the lower part IRSL underestimates OSL ages by up to ~15 ka for the period 40–60 ka. Interpretations hence refer to the OSL data set. Second, we applied Bayesian age-depth modelling to data sets from Hecklingen to resolve inversions in the original ages, also reducing averaged 1σ uncertainty by ~19% (OSL) and ~12% (IRSL). Modelled chronologies point out phases of increased (MIS 2, early MIS 3) and reduced (middle and late MIS 3) sedimentation, but interpretation of numerical rates is problematic because of intense erosion and slope wash particularly during MIS 3. Finally, previously obtained grain-size data were re-investigated by end member modelling analyses. Three fundamental grain-size distributions (loadings) explain the measured data sets and offer information on intensity and – combined with modelled OSL ages – timing of geomorphic processes. We interpret the loadings to represent (i) primary loess accumulation, (ii) postdepositional pedogenesis and/or input of aeolian fine fractions, and (iii) input of coarse aeolian material and/or slope wash. The applied modelling tools facilitate detailed understanding of site-formation through time, allowing us to correlate a strong peak in mean grain size at ~26–24 ka to the maximum extent of the SIS and increased influence of easterly winds. |
format |
Article in Journal/Newspaper |
author |
Schmidt, Christoph Zeeden, Christian Krauß, Lydia Lehmkuhl, Frank Zöller, Ludwig |
author_facet |
Schmidt, Christoph Zeeden, Christian Krauß, Lydia Lehmkuhl, Frank Zöller, Ludwig |
author_sort |
Schmidt, Christoph |
title |
A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools |
title_short |
A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools |
title_full |
A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools |
title_fullStr |
A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools |
title_full_unstemmed |
A chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern Harz foreland, Germany, based on innovative modelling tools |
title_sort |
chronological and palaeoenvironmental re‐evaluation of two loess‐palaeosol records in the northern harz foreland, germany, based on innovative modelling tools |
publishDate |
2021 |
url |
https://serval.unil.ch/notice/serval:BIB_E4E18C1E9853 https://doi.org/10.1111/bor.12510 https://serval.unil.ch/resource/serval:BIB_E4E18C1E9853.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_E4E18C1E98533 |
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ENVELOPE(-82.300,-82.300,-79.933,-79.933) |
geographic |
Strong Peak |
geographic_facet |
Strong Peak |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas, vol. 50, pp. 746-763 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/bor.12510 info:eu-repo/semantics/altIdentifier/pissn/0300-9483 info:eu-repo/semantics/altIdentifier/pissn/1502-3885 info:eu-repo/grantAgreement/OTHER//ZO51-39-1/// info:eu-repo/grantAgreement/OTHER//ID 57444011 - SFB 806/// info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_E4E18C1E98533 https://serval.unil.ch/notice/serval:BIB_E4E18C1E9853 doi:10.1111/bor.12510 https://serval.unil.ch/resource/serval:BIB_E4E18C1E9853.P001/REF.pdf http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:ch:serval-BIB_E4E18C1E98533 |
op_rights |
info:eu-repo/semantics/openAccess CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12510 |
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Boreas |
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50 |
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